I am trying to create a suppression list by domain for a target list on a campaign. I see where I can select this as a type for this target list, but do not see where I am able to enter the domains. I can't really select them as targets, leads or contacts because I am just looking to suppress by domain. Any experience or help on this available?

The How-To-Guide simple says enter the domain name.... but where???

Sorry if this is a silly question - just trying to get some quick help.

Thanks!
Teresa